Eventing: defined process_event API for bigfin and handler placeholders.
Eventing: defined process_event API for bigfin and handler placeholders.

This patch adds process event API for bigfin which accepts events specific
to bigfin and invokes respecitve event handlers. As of now the event is just
persisted in the DB and only event handler placeholders are defined.

Change-Id: I913c46d3592d807ca71d351e4bec54166e20bc1d
Signed-off-by: nnDarshan <d2c6d450ab98b078f2f1942c995e6d92dd504bc8@gmail.com>

skyrings/bigfin,skyrings/bigfin,skyrings/bigfin